fmtutil-sys: command not found

Maybe Your $PATH variable doesn't contain the default paths? echo $PATH should give something like:

[root@server ~]# echo $PATH
/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/root/bin

If it's empty, You may set the PATH variable with this command

export PATH="/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/root/bin"

On CentOS possible default full paths are:

/usr/bin/fmtutil-sys - from package: texlive

You may install the required package with command yum install {package}

On Debian possible default full paths are:

/usr/bin/fmtutil-sys - from package: texlive-base

You may install the required package with command apt-get install {package}

Error in other languages:
fmtutil-sys: bevel nie gevind nie
fmtutil-sys: comandă negăsită
fmtutil-sys: comando não encontrado
fmtutil-sys: commande introuvable
fmtutil-sys: command not found
fmtutil-sys: käsku ei ole
fmtutil-sys: không tìm thấy lệnh
fmtutil-sys: komanda nerasta
fmtutil-sys: Kommando nicht gefunden.
fmtutil-sys: kommandot finns inte
fmtutil-sys: komut yok
fmtutil-sys: nie znaleziono polecenia
fmtutil-sys: níor aimsíodh an t-ordú
fmtutil-sys: no se encontró la orden
fmtutil-sys: no s'ha trobat l'ordre
fmtutil-sys: opdracht niet gevonden
fmtutil-sys: parancs nem található
fmtutil-sys: perintah tidak ditemukan
fmtutil-sys: príkaz nenájdený
fmtutil-sys: příkaz nenalezen
fmtutil-sys: команда не найдена
fmtutil-sys: командата не е открита
fmtutil-sys: 命令找不到
fmtutil-sys: コマンドが見つかりません